void djvOpenGlImageShader::init(
const QString & vertex,
const QString & fragment) throw (djvError)
{
if (vertex == _vertex && fragment == _fragment)
return;
//DJV_DEBUG("djvOpenGlImageShader::init");
//DJV_DEBUG_PRINT("fragment = " << fragment);
del();
_vertex = vertex;
_fragment = fragment;
GLint error = GL_FALSE;
_vertexId = shaderCreate(GL_VERTEX_SHADER);
_fragmentId = shaderCreate(GL_FRAGMENT_SHADER);
shaderCompile(_vertexId, _vertex);
shaderCompile(_fragmentId, _fragment);
DJV_DEBUG_OPEN_GL(_program = glCreateProgram());
if (! _program)
{
throw djvError(
"djvOpenGlImageShader",
djvOpenGlImage::errorLabels()[djvOpenGlImage::ERROR_CREATE_PROGRAM]);
}
DJV_DEBUG_OPEN_GL(glAttachShader(_program, _vertexId));
DJV_DEBUG_OPEN_GL(glAttachShader(_program, _fragmentId));
DJV_DEBUG_OPEN_GL(glLinkProgram (_program));
glGetProgramiv(_program, GL_LINK_STATUS, &error);
char log [4096] = "";
GLsizei logSize = 0;
glGetProgramInfoLog(_program, 4096, &logSize, log);
//DJV_DEBUG_PRINT("log = " << QString(log));
if (error != GL_TRUE)
{
throw djvError(
"djvOpenGlImageShader",
djvOpenGlImage::errorLabels()[djvOpenGlImage::ERROR_CREATE_PROGRAM].
arg(log));
}
}
GLuint shaderLoadAndCompile( ShaderSource *s )
{
GLuint shader = 0;
GLchar *text = loadText( s->fname );
if( text )
{
shader = shaderCompile( s->type, s->fname, text );
free( text );
}
return shader;
}
